Means for circulating air



March 23, 1937. A. GILL MEANS FOR CIRCULATING AI-R Filed Ma rch 27, 1936 Patented Mar. 23, 1937 UNITED STATES PATENT OFFICE Application March 27, 1936, Serial No. 71,286 In New Zealand February 17, 1936 1 Claim.

In the ventilation of rooms and for circulation of air therein the use of fans and blowers is well known. These devices generally comprise arms or blades rotating in a casing or may be the 5 usual well-known type of centrifugal fan comprising blades, sometimes detachable, mounted on a revolving shaft enclosed in a casing.

It is also known to circulate currents of air by paddles but such paddles are generally parts of separate and individual units and are mounted on a shaft generally electrically driven solely for this purpose.

The idea or principle underlying the present invention is to utilize suitable uncovered portions of shafting in factories or the like primarily used for other purposes to receive and rotate when desired unencased paddles so bent or shaped as to ensure as far as possible adequate circulation or movement of the air. Such paddles are further characterized by being relatively much longer than they are deep.

The paddles will be detachable from the shaft so that they may be removed in cold weather or when otherwise not required.

Referring to the drawing accompanying this specification Figure 1 shows a front view of a paddle attached to a shaft:

Figure 2 is a side View of Figure 1;

Figure 3 shows the paddles mounted on the shafting under the work benches in the sewing machine division of a clothing factory while,

Figure 4 is an end view of Figure 3.

The figures are not necessarily drawn to scale nor is any accuracy aimed at in the representation of work benches and associated parts.

In the preferred form of my invention as illustrated in the drawing paddle plates I made from sheet metal, wood or any other convenient material are secured to arms 2 by rivets 4 or by being bolted, welded, or secured in any suitable known manner thereto. The arms 2 are clamped or otherwise detachably secured to the shafting 3. The outer edges 5 of said paddle plates 1 are bent slightly forward in the direction of rotation to prevent air slipping past during rotation and ensure as far as possible adequate displacement of air by the paddles. In the drawing the direction of the shaft rotation is indicated by an arrow.

Figures 3 and 4 show a particularly successful adaptation of the invention as applied to the sewing machine division in a clothing factory and as an instance of a successful use of the paddles as applied to the shaft in such a factory the paddles are of the following dimensions:-length of a paddle plate is 24 inches, and the distance from the centre of shaft to outer edge of a paddle plate is 5 inches.

What I claim as new and desire to secure by Letters Patent is:-

Means for inducing air circulation when combined with a line shaft including at least two supports, each involving metal strips of substantially uniform width formed adjacent one end with a semicircular offset portion of a diameter corresponding to that of the shaft, each strip extending beyond the semicircular portion in one direction as a short arm and in the opposite direction as along arm, removable connectors fixing the short arm of one strip to the long arm of the other strip with the semicircular portions of the strips embracing the shaft and the connectors serving to fix the strips with respect to the shaft, and blades secured to the long arms of spaced supports to dispose the blades in spaced parallel relation with and parallel to the shaft.

ARTHUR GIIL. 

